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Eleven novel mutations of the BCKDHA, BCKDHB and DBT genes associated with maple syrup urine disease in the Chinese population: Report on eight cases
Li, Xiyuan1; Ding, Yuan1; Liu, Yupeng1; Ma, Yanyan1; Song, Jinqing1; Wang, Qiao1; Li, Mengqiu2; Qin, Yaping2; Yang, Yanling1
关键词Maple syrup urine disease Branched chain amino acids BCKDHA gene BCKDHB gene DBT gene Prenatal diagnosis
刊名EUROPEAN JOURNAL OF MEDICAL GENETICS
2015-11-01
DOI10.1016/j.ejmg.2015.10.002
58期:11页:617-623
收录类别SCI
文章类型Article
WOS标题词Science & Technology
类目[WOS]Genetics & Heredity
研究领域[WOS]Genetics & Heredity
关键词[WOS]OLD ORDER MENNONITES ; BRANCHED-CHAIN ; AMINO-ACIDS ; LIVER-TRANSPLANTATION ; FOUNDER MUTATION ; NEUTRAL AMINO ; DIAGNOSIS ; BRAIN ; DAMAGE ; MSUD
英文摘要

Maple syrup urine disease (MSUD) is a rare autosomal recessive disorder that affects the degradation of branched chain amino acids (BCAAs). Only a few cases of MSUD have been documented in Mainland China, and prenatal diagnosis has not been performed so far. In this report, 8 patients (4 girls and 4 boys) with MSUD from 8 unrelated Chinese families were diagnosed at the age of 9 days to 1 year and 8 months. The diagnosis was confirmed by serum BCAAs and genetic analyses. Among the 8 patients, only one was detected by newborn screening. The remaining 7 patients were admitted because of neurological disorders and underwent selective screening. Significantly elevated BCAAs were observed in 7 patients. One patient was diagnosed by post-mortem study. 12 mutations were found in the BCKDHA, BCKDHB and DBT genes. 11 of these mutations were novel: c.178G > T, c.491T > C, c.740A > G, c.1214_1219dupCCAACC and IVS6 + 1delG in BCKDHA; c.482T > G, c.508C > T, c.767A > G, c.768C > G and IVS4, -2A > C in BCKDHB; and c.1A > G in DBT. Only one mutation, c.659C > T in the BCKDHA gene, had been previously reported. 7 patients were treated by dietary intervention and symptomatic therapy. 6 of them showed clinical improvement. The mother of one patient who died from MSUD underwent amniocentesis during her second pregnancy. The BCAAs level in her amniotic fluid was normal. Only one heterozygous mutation, IVS4, -2A > C in the BCKDHB gene, was detected in the cultured amniocytes. The results revealed that the fetus was not affected by MSUD. Normal development and the blood BCAAs profile confirmed the prenatal diagnosis after birth. Thus, we identified eleven novel mutations associated with MSUD in the Chinese population. Prenatal diagnosis of MSUD was successfully performed on one fetus by genetic analysis of the cultured amniocytes. (C) 2015 Elsevier Masson SAS. All rights reserved.

语种英语
WOS记录号WOS:000365349200010
项目编号81471097 ; 2012BAI09B04
资助机构National Natural Science Foundation of China ; Beijing key laboratory of molecular diagnosis and study on pediatric genetic diseases ; 12th Five-year Plan National Key Technology R &amp ; D Program from the Ministry of Science and Technology
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bjmu.edu.cn/handle/400002259/66397
专题北京大学第一临床医学院_儿科
北京大学第二临床医学院_儿科
北京大学口腔医学院_义齿加工中心
作者单位1.Peking Univ, Dept Pediat, Hosp 1, Beijing 100034, Peoples R China
2.Similan Clin, Beijing 100070, Peoples R China
推荐引用方式
GB/T 7714
Li, Xiyuan,Ding, Yuan,Liu, Yupeng,et al. Eleven novel mutations of the BCKDHA, BCKDHB and DBT genes associated with maple syrup urine disease in the Chinese population: Report on eight cases[J]. EUROPEAN JOURNAL OF MEDICAL GENETICS,2015,58(11):617-623.
APA Li, Xiyuan.,Ding, Yuan.,Liu, Yupeng.,Ma, Yanyan.,Song, Jinqing.,...&Yang, Yanling.(2015).Eleven novel mutations of the BCKDHA, BCKDHB and DBT genes associated with maple syrup urine disease in the Chinese population: Report on eight cases.EUROPEAN JOURNAL OF MEDICAL GENETICS,58(11),617-623.
MLA Li, Xiyuan,et al."Eleven novel mutations of the BCKDHA, BCKDHB and DBT genes associated with maple syrup urine disease in the Chinese population: Report on eight cases".EUROPEAN JOURNAL OF MEDICAL GENETICS 58.11(2015):617-623.
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